Post on 05-Jan-2022
Inverter Air Cooled Screw Chiller
Contents
Product Introduction Product Features Core Advantages Reference Projects
1 2 3 4
Product Introduction
04
Capacity Range: 115-415RT (Single comp. / Dual comp.)
Operating Ambient Temp. Range: -24℃ -48℃
Refrigerant: R134a
Perfect for commercial applications where need inverter air cooled products, excellent part load performance, free cooling, all year round cooling etc.
Model SCAF130HV SCAF150HV SCAF175HV SCAF200HV SCAF225HV
Nominal parameter
12/7 conditionCooling capacity① kW 460.3 525.1 618.6 700.7 780.0Power input① kW 143.4 162.6 189.8 214.9 238.5COP① kw/kw 3.21 3.23 3.26 3.26 3.27
15/10 conditionCooling capacity② kW 502.0 568.2 669.3 757.1 844.0Power input② kW 149.9 168.6 197.4 222.0 247.5COP② kw/kw 3.35 3.37 3.39 3.41 3.41
100%FCCooling capacity③ kW 502.0 568.2 669.3 757.1 844.0Power input③ kW 35.6 35.6 40.5 45.4 45.4
Unit dimensionsLength mm 5235 5235 6240 7245 7245Width mm 2300 2300 2300 2300 2300Height mm 2400 2400 2400 2400 2400
①Cooling:ambient temp. 35℃, EWT/LWT:12℃/7℃, fouling factor=0.0176 m2.℃/kW②Cooling: ambient temp. 35 ℃, EWT/LWT:15℃/10℃, fouling factor=0.0176 m2.℃/kW③100% Free Cooling: EWT/LWT:15℃/10℃, fouling factor=0.0176 m2.℃/kW
05
Single compressor unit
Note: The information in this PPT may be changed, please refer to the actual product.
06
2
6
Low noise fan
54
7
3
8
9
10
Fin-coil condenser
Control panel
Built-in touch screen
Noise reduction box for compressor
Double oil separationCompressor filter + centrifugal oil separation, oil rate of heat exchanger is below 0.03%
High efficiency compressorVariable frequency drive (from 25Hz to 70Hz), part load energy efficiency is as high as 4.3
Precise EXVMatched with intelligent control, enables reliable operation in extreme conditions
Flooded evaporatorStrong evaporation
1
VFD
Product Features
08
Variable frequency drive, high part load efficiency
1Hz smooth adjustment
Smooth loading and unloading can be achieved at 1Hz and the water
temperature can be controlled accurately.
Low starting current, low power requirements
Large capacity inverter motor design, high efficiency
High efficiency can be achieved under any load.Low loss silicon steel core.Real-time monitoring of motor temperature, combined with refrigerant cooling, high stability and long service life.
09
High efficiency and low noise axial flow fan.
Inverted M-type air-side heat exchanger, easy to be processed and the airflow is evenly distributed to achieve high efficiency heat exchange.
High efficiency inner-threaded pipes and high quality arc-shaped window aluminum fins are closely combined by mechanical expansion pipe to improve heat transfer efficiency, reduce pressure loss and
wind noise.
Professional temperature field simulation, optimized design, not easy to frost.
Low noise fan Fin-coil heat exchanger Aluminum fins
10
High precision electronic expansion valve (EXV) Thermostatic expansion valve
Internationally renowned brands, stable and reliable quality
Responsive, no hysteresis, improve unit energy efficiency
PID high-precision adjustment to ensure that the whole situation is stable and efficient operation
11
5~10dBA noise reduction (standard with sound insulation box and low noise fan)
Super low noise solution can be customized
60
70
80
90
dB(A)
Conventional AC Screw With sound insulation box and low noise fan
As low as 72
81-90
As low as 75
Double layer sound insulation material + super low noise fan (customized)
The inner wall of the box is made of highly effective silencing materials
12
7-in colorful touch screen
Real-time operating parameters (temperature, pressure etc.) display
Three-level password setting to prevent misoperation
Detailed fault information record
Power-off memory function
Timed ON/OFF
Master & Slave, Back-up, Duty cycling
Compatible with QuickView, M-Cloud, Midea Chiller Plant Control, BMS
13
With glycol in
chiller
No glycol in terminal
system
Indirect free cooling Circulating water in the project system is conventional water
Free cooling fin, plate heat exchanger and glycol circulating pump to form a closed system
Equipped with plate heat exchanger, transfer free cooling energy to the whole project
The terminal system and the water pump do not need to consider the performance attenuation and water resistance increase caused by antifreeze liquid
Two-stage heat exchange can reduce heat exchange requirements of the compressor
No need for special water system design
Direct free cooling
Circulating water in the project system is with glycol Free cooling fin + electric three-way valve, achieve free cooling at low ambient temperature Direct heat exchange, high heat exchange efficiency Overall project circulating water is anti-freeze liquid, strong anti-freezing ability Client requires consideration of glycol system design
14
Air flow
Refr
igera
nt
syst
em
Gly
col so
luto
n
Technical features: In Europe, Midea (Clivet) free cooling technology has been used successfully for more than ten years Inverter compressor, the IPLV exceeds more than 15% of fixed-frequency units Built-in free cooling heat exchanger, less space. Free cooling and compressor refrigeration sharing a set of fans, energy saving and easy maintenance. Inverter fan is optional, lower starting current, higher efficiency and energy saving.
AE
35°C
EXV
1
5
3
2
6
4T
100%
TW outTT
PD
10°C
TW in15°C
AE
35°C
15°C
TW in
EXV
1
5
6
3
2
4T
100%
10°C
TW out
TT PD
T
AE
11°C
15°C
TW in
EXV
1
5
6
3
2
4T
50%
10°C
TW out
TT PD
T
AE
0°C
15°C
TW in
EXV
1
5
6
3
2
4T
0%
10°C
TW out
TT PD
T
AE
11°C
EXV
1
5
6
2
4T
3
50%
TW outTT
PD
TW in15°C
AE
0°C
1
5
6
3
2
EXV
4 T
0%
TW outTT
PD
TW in15°C
Without plate HE With plate HE
Three operating modes:
High ambient temp.: variable frequency operation
Free cooling:OFF
Compression cycle:ON
Medium ambient temp.:hybrid cooling
Free cooling:ON
Compression cycle:ON
Low ambient temp.: free cooling
Free cooling:ON
Compression cycle:OFF
15
Full load operating at +46℃ (high ambient temp.) Free cooling at -24℃ (low ambient temp.)
High precision temperature/pressure sensor, monitoring the running state of the unit at any time. The auxiliary heating and anti-freezing technology ensures safe operation and storage in low temperature environment. Free cooling has been used for many years in ultra-low temperature environments in Northern Europe.
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CoreAdvantages
18
High efficiency1. Inverter compressor2. Optimized heat exchanger3. High precision EXV 4. Double oil separation5. Intelligent control6. Quick start (180s)7. Free cooling (optional)
Quiet operation1. Optimized system design, eliminate abnormal noise caused by flow2. Noise reduction box for compressor + low noise fan, reduced 5~10dBA3. Double layer sound insulation material + super low noise fan (customized)
Wide application1. Heavy anti-corrosion2. Inverter fan3. High water outlet temp. (20℃)4. Large temp. difference (8~10℃)5. 380-460V-50/60Hz6. T3 condition7 . For other options, please contact with Midea Intelligent control
1. Colorful touch screen2. QuickView3. M-Cloud4. Midea Chiller Plant Control5. BMS
Reference Projects
Mozambique Capital Airport
Country:Mozambique
Capacity:4,000 RT
Sheraton Bandara Resort Hotel
Country:Indonesia
Capacity:1,050 RT
20
Rize Hospital
Country:Turkey
Capacity:340 RT
Hub Power Station
Country:Pakistan
Capacity:1,024 RT
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